DataReadRequest

Request for reading data from Google Fit. Use this request to specify the data types to
read, as well as aggregation parameters. Read requests require a time range and allow reading
data in detailed or aggregated fashion. A single request can be used to read multiple data
types and data sources together.

Returns

Returns all of the data types that will be read then aggregated as part of this
request. The default data source for each data type will be read, then aggregated as
specified in
aggregate(DataType, DataType).